condition mean min max 0 h after light 1.9621750000000002 1.57149 2.35286 4 h after light 2.477405 2.47687 2.47794 8 h after light 1.942915 1.92925 1.95658 4 h after dark 2.494335 2.0637 2.92497 8 h after dark 2.609125 2.31294 2.90531 12 h after dark 1.42226 1.11379 1.73073